/* ==========================================
   龙虾找车 - 首页样式 (index.css)
   ========================================== */

/* --- Hero --- */
.hero {
  min-height: 100vh;
  padding: var(--nav-height) 0 0;
  display: flex;
  align-items: center;
  background: linear-gradient(160deg, #1D2129 0%, #2a1a15 40%, #1D2129 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(232,69,42,0.18) 0%, transparent 70%);
  border-radius: 50%;
  animation: hero-glow 6s ease-in-out infinite alternate;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -10%;
  left: -5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255,107,53,0.12) 0%, transparent 70%);
  border-radius: 50%;
  animation: hero-glow 8s ease-in-out infinite alternate-reverse;
}

@keyframes hero-glow {
  0% { transform: scale(1); }
  100% { transform: scale(1.15); }
}

/* AI neural network decorative background */
.hero-ai-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  opacity: 0.06;
}

.hero-ai-bg .dot {
  position: absolute;
  width: 4px;
  height: 4px;
  background: #fff;
  border-radius: 50%;
}

.hero-ai-bg .line {
  position: absolute;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.5), transparent);
  transform-origin: left center;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  min-height: calc(100vh - var(--nav-height));
  padding: 60px 0;
}

.hero-text { color: var(--white); }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(232, 69, 42, 0.15);
  border: 1px solid rgba(232, 69, 42, 0.3);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  color: #FF8A6A;
  margin-bottom: 24px;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: #FF6B35;
  border-radius: 50%;
  animation: badge-pulse 1.5s infinite;
}

@keyframes badge-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-h1 {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero-h1 .ai-word {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 480px;
}

.hero-search {
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: 8px;
  display: flex;
  align-items: center;
  margin-bottom: 20px;
  max-width: 520px;
}

.hero-search-input {
  flex: 1;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 15px;
  padding: 14px 18px;
}

.hero-search-input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.hero-search-btn {
  background: var(--primary-gradient);
  color: #fff;
  border: none;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: var(--transition);
}

.hero-search-btn:hover {
  box-shadow: var(--shadow-primary);
  transform: translateY(-1px);
}

.hero-quick-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.hero-quick-tag {
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-full);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  cursor: pointer;
  transition: var(--transition);
}

.hero-quick-tag:hover {
  background: rgba(232, 69, 42, 0.2);
  border-color: rgba(232, 69, 42, 0.4);
  color: #FF8A6A;
}

/* Hero Buttons */
.hero-buttons {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
}

/* Hero AI Chat Demo */
.hero-chat-demo {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: 28px;
  max-width: 460px;
  justify-self: end;
  position: relative;
}

.hero-chat-demo::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(232,69,42,0.3), transparent 50%, rgba(255,107,53,0.2));
  z-index: -1;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  -webkit-mask-composite: xor;
  padding: 1px;
}

.chat-demo-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.chat-demo-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.chat-demo-name {
  font-size: 14px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
}

.chat-demo-status {
  font-size: 12px;
  color: #10B981;
  display: flex;
  align-items: center;
  gap: 4px;
}

.chat-demo-status::before {
  content: '';
  width: 6px;
  height: 6px;
  background: #10B981;
  border-radius: 50%;
}

.chat-bubbles { }

.chat-bubble {
  max-width: 88%;
  padding: 12px 16px;
  border-radius: 16px;
  margin-bottom: 10px;
  font-size: 14px;
  line-height: 1.6;
  opacity: 0;
  transform: translateY(10px);
}

.chat-bubble.show {
  opacity: 1;
  transform: translateY(0);
  transition: all 0.4s ease;
}

.chat-bubble.bot {
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.85);
  border-bottom-left-radius: 4px;
}

.chat-bubble.user {
  background: var(--primary-gradient);
  color: #fff;
  border-bottom-right-radius: 4px;
  margin-left: auto;
}

.chat-car-mini {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 12px;
  margin-top: 8px;
}

.chat-car-mini-name {
  font-size: 13px;
  font-weight: 600;
  color: #fff;
}

.chat-car-mini-info {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 2px;
}

.chat-car-mini-price {
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
  margin-top: 6px;
}

/* Hero stats */
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stat { }
.hero-stat-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--white);
}

.hero-stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 4px;
}

/* --- Features Section --- */
.features { background: var(--bg); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: var(--transition);
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-gradient);
  transform: scaleX(0);
  transition: transform 0.3s;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(232, 69, 42, 0.1);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon-wrap {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-lg);
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  position: relative;
}

.feature-icon-wrap.ai-icon {
  background: linear-gradient(135deg, rgba(232,69,42,0.1), rgba(255,107,53,0.1));
}

.feature-icon-wrap.ai-icon::after {
  content: 'AI';
  position: absolute;
  top: -6px;
  right: -6px;
  background: var(--primary-gradient);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 6px;
}

.feature-icon-wrap.car-icon {
  background: linear-gradient(135deg, rgba(59,130,246,0.1), rgba(99,102,241,0.1));
}

.feature-icon-wrap.pick-icon {
  background: linear-gradient(135deg, rgba(16,185,129,0.1), rgba(52,211,153,0.1));
}

.feature-icon-wrap.tool-icon {
  background: linear-gradient(135deg, rgba(245,158,11,0.1), rgba(251,191,36,0.1));
}

.feature-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: var(--transition);
}

.feature-link:hover { gap: 8px; }

/* --- Steps Section --- */
.steps {
  background: var(--white);
  position: relative;
  overflow: hidden;
}

.steps::before {
  content: '';
  position: absolute;
  top: 0;
  right: -200px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(232,69,42,0.04), transparent 70%);
  border-radius: 50%;
}

.step-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.step-row:last-child { margin-bottom: 0; }
.step-row.reverse { direction: rtl; }
.step-row.reverse > * { direction: ltr; }

.step-visual {
  background: linear-gradient(135deg, #fafafa, #f5f5f5);
  border-radius: var(--radius-xl);
  padding: 40px;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  border: 1px solid #eee;
}

.step-text { }

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--primary-gradient);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 16px;
}

.step-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.step-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.step-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.step-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}

.step-feature-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.1);
  color: #10B981;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  flex-shrink: 0;
}

/* Step visual content */
.step-chat-demo { width: 100%; }

.step-chat-msg {
  padding: 12px 16px;
  border-radius: 16px;
  margin-bottom: 8px;
  font-size: 14px;
  line-height: 1.6;
  max-width: 85%;
}

.step-chat-msg.bot {
  background: var(--white);
  border: 1px solid #eee;
  border-bottom-left-radius: 4px;
  color: var(--text-primary);
}

.step-chat-msg.user-msg {
  background: var(--primary-gradient);
  color: #fff;
  border-bottom-right-radius: 4px;
  margin-left: auto;
}

.step-car-list { width: 100%; }

.step-car-item {
  background: var(--white);
  border: 1px solid #eee;
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.step-car-thumb {
  width: 64px;
  height: 48px;
  background: linear-gradient(135deg, #f0f0f0, #e8e8e8);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.step-car-info { flex: 1; }

.step-car-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.step-car-meta {
  font-size: 12px;
  color: var(--text-weak);
  margin-top: 2px;
}

.step-car-price {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  white-space: nowrap;
}

.step-pickup-demo {
  text-align: center;
  width: 100%;
}

.pickup-timeline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 24px;
}

.pickup-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  position: relative;
}

.pickup-step-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  position: relative;
  z-index: 1;
}

.pickup-step-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

.pickup-line {
  width: 40px;
  height: 2px;
  background: var(--border);
  margin-bottom: 24px;
}

/* --- Data Section --- */
.data-section {
  background: linear-gradient(135deg, #1D2129, #2a1a15, #1D2129);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.data-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(232,69,42,0.1), transparent 70%);
  border-radius: 50%;
}

.data-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
  z-index: 1;
}

.data-item { text-align: center; }

.data-num {
  font-size: 48px;
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.data-label {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 8px;
}

/* --- Testimonials --- */
.testimonials { background: var(--bg); }

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
  border: 1px solid transparent;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(232, 69, 42, 0.1);
}

.testimonial-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}

.testimonial-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.testimonial-role {
  font-size: 13px;
  color: var(--text-weak);
}

.testimonial-stars {
  color: #FF6B35;
  font-size: 14px;
  margin-bottom: 14px;
}

.testimonial-text {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* --- Responsive: Index --- */
@media (max-width: 1199px) {
  .hero-inner { gap: 40px; }
  .hero-h1 { font-size: 42px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .data-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
}

@media (max-width: 767px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 40px 0 60px;
    min-height: auto;
  }

  .hero-h1 { font-size: 32px; }
  .hero-sub { font-size: 16px; }
  .hero-buttons { flex-direction: column; }
  .hero-chat-demo { max-width: 100%; justify-self: start; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .hero-stat-num { font-size: 24px; }

  .features-grid { grid-template-columns: 1fr; }

  .step-row, .step-row.reverse {
    grid-template-columns: 1fr;
    gap: 24px;
    direction: ltr;
  }

  .step-row.reverse > * { direction: ltr; }
  .step-visual { min-height: 240px; }
  .step-title { font-size: 22px; }

  .data-grid { grid-template-columns: repeat(2, 1fr); }
  .data-num { font-size: 32px; }

  .testimonials-grid { grid-template-columns: 1fr; }

  .pickup-timeline { flex-wrap: wrap; gap: 8px; }
  .pickup-line { width: 24px; }
}